how to repair this bug?

Hey there @NoVatRy11! Welcome to the community! This issue can often stem from a graphics driver issue. May I know your specs?

In the meantime, let’s verify it’s a graphics issue. Try downgrading to a lower RHI (DirectX11 if you can) and see if the tearing still occurs. If not, then we’ll run through the gauntlet of possible fixes. (Some of them are listed in the thread below but I can give more targeted ones depending on your specs and answer to this question)

How to change RHI in and out of engine:

Thread with some GPU aid: